Yersinia enterocolitica Flashcards Preview

Microbiology Block 3 > Yersinia enterocolitica > Flashcards

Flashcards in Yersinia enterocolitica Deck (12):
1

what is the biology of Yersinia?

  • Gram Negative Bacilli
  • “Bi-Polar Staining
  • Non-lactose fermenter
  • Motile at 25° but not at 37°
  • Coagulase (+)
  • Cold Growth

2

what does yersinia ferment?

sucrose

3

how does yersinia spread?

  • fecal-oral if contact with animals (zoonotic)
  • Associated with unpasteurized milk, soft cheeses and undercooked pork products

4

when is there higher incidence of yersinia infeciton?

Higher incidence in cold climates and months

5

how does the infection of yersinia progress?

  1. Access to lamina propria is primarily through M cells
  2. T3SS effectors mediate resistance to mac killing and can trigger apoptosis
  3. Travel via macrophages to MLN and replicate intracellular.

6

most yersenia infections occur on who?

children

7

what does yersinia infection cause?

 

gastroenteritis

8

yersinia infection has what symptoms?

  1. Severe abdominal cramping
  2. Low-grade fever
  3. Vomiting
  4. Large volume watery diarrhea,

9

what complications can arise with yersinia enterocolitica?

  • Reactive arthritis (HLA-B27)
  • Pseudo-appendicitis*/mesenteric adenitis (older children&teens)
  • Erythema nodosum** (adults)

10

what treatment is given to yersinia enterocolitica infection?

Supportive

11

how does yersinia look on Hektoen agar?

     Yellow colony 

12

how does yersinia look on MacConkey agar?

whitish-transluscent